Power driven tool for cleaning coke oven doors



Sept. 26, 1967 Filed Feb. 12, 1965 J. J. CIOCHETTO POWER DRIVEN TOOL FOR CLEANING COKE 'OVEN DOORS 5 Sheets-Sheet 1 F aJ I N VEN TOR.

JOJEPH J. (lac/As r74 p 1967 J. J. CIOCHETTO POWER DRIVEN TOOL FOR CLEANING COKE OVEN DOORS Filed Feb. 12, 1965 6 Sheets-Sheet 2 INVENTOR. J05PH J. (IOU/770 Sept. 26, 196'? J. J. CIOCHETTO 3,343,193

POWER DRIVEN TOOL FOR CLEANING COKE OVEN DOORS I Filed Feb. 12, 1965 5 Sheets-Sheet 5 INVENTOR J05EPH .1 6/06/15 770 United States Patent Ofiice 3,343,193 Patented Sept. 26, 1967 3,343,193 POWER DRIVEN TOOL FOR CLEANING COKE OVEN DOORS Joseph J. Ciochetto, Glenshaw, Pa., assignor to Koppers Company, Inc., a corporation of Delaware Filed Feb. 12, 1965, Ser. No. 432,124 Claims. (Cl. -93) ABSTRACT OF THE DISCLOSURE A tool for cleaning a coke oven door and the adjacent door frame. The tool has an arbor with radially extending arms. The arbor is connected to a drive shaft and is movable axially relative thereto with a resilient means to urge the arbor in one direction. The radially extending arms have cutter elements secured thereto and extending therefrom. The cutter elements upon rotation of the arbor travel in circumferential and annular cleaning paths to clean a pair of surfaces arranged parallel to the front face of the arbor and another surface arranged perpendicular to the front face of the arbor.

This invention relates to an improved tool for cleaning the seal ring and side portions of a coke oven door and more particularly to a rotary power driven tool having self-cleaning, quick change reversible cutter elements that are arranged to remove both hard and soft tar deposits from the surface of the metal seal ring and the coke oven door side portions.

In a conventional coke oven battery the plurality of horizontal coking chambers or ovens have coke oven doors sealing the coke chamber open .end portions. The coke oven doors provide a seal for the coke oven chambers during the coking operation so that the coal may be heated and coked under nonoxidative conditions. The coke oven doors are constructed so that the door is self-sealing when positioned in the coke oven door receiving frame. The coke oven doors are removed and the charge of coke is removed from the horizontal coking chambers by means of pusher machines that push the coke out of the coking chambers into suitable receivers.

During the coking operation, a tarry material is deposited on the inner portion of the door and the peripheral seal ring extending therearound. When the door is removed, the tarry deposits must be removed from both the inner portion of the door and from the peripheral seal ring, as well as from the coke oven door frame before the door can be repositioned in sealing engagement with the door frame. The tarry deposits on the door frame comprise both a hard carbonaceous material and a soft, highly viscous tarry distillation product evolved by the coal during the coking process. To effectively remove this tarry deposit from the coke oven door surfaces, it is necessary at times to cut or chip away the relatively hard brittle tar deposits. The soft, highly viscous tar product also encrusted on the coke oven door and metal sealing ring surface is tacky and adherse to the cutting tool. One of the major problems encountered in removing the tarry deposits from the coke oven door and peripheral sealing ring is the contamination of the apparatus used to remove the tarry deposits by the soft adhesive tarry materials. For example, when rotary brush-like power driven cleaning tools are employed, the soft tarry deposit on the coke oven door adheresto the axially extending bristle-like cutters so that frequent cleaning of the tool is required. The cleaning of the tool is time consuming and interrupts the door cleaning operation.

It is highly desirable to replace the coke oven doors in the respective door frames as rapidly as possible after the pusher machine has ejected the coke charge from the chamber. Extractor mechanisms are provided to remove the coke oven doors from the coking chamber and move the coke oven door so that the oven can be pushed by the pusher machine. While the oven is being pushed the tar deposits are removed from the coke oven door. It is highly desirable, therefore, to complete the'door cleaning operation as rapidly as possible so that the door can be replaced as soon as the pusher machine is removed from the coking chamber.

The self sealing coke oven door has a refractory plug that extends into the coking chamber. The refractory plug is supported in a metallic refractory retainer that forms side wall portions of the coke oven door. A metal seal ring is secured to the door casting and forms a peripheral frame member that extends laterally from the door side wall portions. The metal seal ring has a forwardly extending flange end portion that forms a rectangular channel portion with the door side portions. The tarry deposits accumulate on all portions of the metal seal ring and the door side portion and it is, therefore, necessary to remove the tar deposits from the pair of spaced parallel peripheral surfaces extending around the coke oven door and from a laterally extending planar surface formed by the body portion of the metal seal ring. The removal of the tar deposits from all of these surfaces in one operation minimizes the time required to clean the various surfaces coated with the tar deposits.

Briefly, the invention includes a tool for simultaneously cleaning the three above described surfaces of the coke oven door in one operation. The cleaning tool includes radially extending cutters that travel in a circumferential cleaning path and also in an annular cleaning path. The cutter elements are self cleaning and have cutting edges on opposite sides thereof to provide a reversible cutting element.

Accordingly, the principal feature of this invention is to provide a rotary driven tool for cleaning a plurality of surfaces of a coke oven door in a single operation.

Another feature of this invention is to provide a tool for cleaning a coke oven door with self cleaning cutter elements that do not clog with the soft tar deposits adhering to the coke oven door.

Another feature of this invention is to provide a tool for cleaning a coke oven door with reversible cutter elements that permit a plurality of edges of the same cutting element to be utilized in removing the tar deposits from the coke oven door.

Another feature of this invention is to provide a power driven tool for cleaning a coke oven door that includes yielding means for a portion of the power driven tool to limit the pressure exerted by the power driven tool against the coke oven door side wall portions.

These and other advantages of this invention will be more completely disclosed and described in the following specification, the accompanying drawings and the appended claims.

In the drawings:

FIGURE 1 is a sectional top plan view of a coke oven door with a pair of the improved power driven cleaning tools operatively positioned for cleaning the coke oven door frame.

FIGURE 2 is a diagrammatic view of a coke oven door with a plurality of the schematically illustrated improved power driven cleaning tools positioned for clearring the peripheral surface of the coke oven door.

FIGURE 3 is an enlarged view of one of the rotary cleaning tools illustrated in FIGURE 1.

FIGURE 4 is a view in front elevation of the improved cutting tool illustrated in FIGURE 3. I

FIGURE 5 is a view in section taken along the line 55 of FIGURE 4.

FIGURE 6 is a view taken along the lines 6-6of FIGURE 4 illustrating a cutter element securedto the arbor.

FIGURE 7 is a view in front elevation similar to FIGURE 4 illustrating another embodiment of the improved rotary cutting tool.

FIGURE 8 is a view in section taken along the line 8-8 of FIGURE 7 illustrating a portion of the improved cleaning tool illustrated in FIGURE 7.

Referring to the drawings and particularly to FIGURE 1, there is illustrated a self sealing coke oven door generally designated by the numeral 10 that has an elongated body portion 12 with rearwardly extending door locking portions 14. The body portion 12 is conventionally formed as a metal casting and has suitable bolt receiving bores formed therein. Secured to the front face of the body portion 12 is a refractory retainer 16 that has forwardly extending flanges 18 and 20. A refractory plug 22 is. positioned between the refractory retainer flanges 18 and 20. The end portions of the flanges 18 and 20 are turned inwardly to secure the refractory plug member 22 therebetween. Each of the refractory retainer flanges 18 and r 20 has an external planar surface 24. A metal seal ring generally indicated by the numeral 26 is secured to the metal casting 12 by means of bolts 28 and extends around the periphery of the coke oven door 10 adjacent to the planar surface 24 on'the sides of the coke oven door. The metal seal ring has a laterally extending body portion 30 with an external surface 32 that is substantially normal to the refractory retainer external planar surface 24. The seal ring 26 has an inturned flanged end portion 34 extending inwardly from the body portion 30 with an inner surface 36 that is substantially parallel to the retainer ring external surface 24.

The coke oven door 10 is arranged to be positioned in a coke oven door frame with the refractory plug extending into the coking chamber. The refractory retainer planar surface 24 and the surfaces 32 and 36 of the metal seal ring 26 accumulate tarry deposits thereon during the coking operation. The seal between the coke oven door and the door frame is effected by the flange 34 on the door seal ring abutting the door frame front surface and provide the seal between the coke oven door 10 and the door frame. It is, therefore, necessary to remove the tarry deposits from the surfaces 24, 32 and 36 before the coke oven door is replaced in the coke oven door frame so that an effective seal may be created therebetween.

The metal seal ring 26 extends around the periphery of the door 10 so that it is necessary to remove the tarry deposits from all sides of the door. FIGUREZ schematically illustrates a coke oven door 10 with a plurality of my improved rotary powerdriven tools generally designated by the numeral 38 positioned to clean the surfaces of the door 10. The arrows in FIGURE 2 illustrate the desired direction that the tools 38 move relative to the periphery of the coke oven door 10. The dash-dot framelike member 40 in FIGURE 2 is intended to designate a suitable support frame for the plurality of cleaning tools 38. Air motors or the like 42 are mounted on the frame 40 and provide rotary motion to the cleaning tools 38, as will be later described. It should be understood that other means may be employed to operatively position and guide the cleaning tools 38 for effectively cleaning the surfaces 24, 32 and 36 of tarry deposits.

The cleaning tool 38, diagrammatically illustrated in FIGURE 2, is illustrated in detail in FIGURES 3, 4 and 5, and includes an arbor 44 with radially extending arms 46, 48, 50 and 52. The arbor 44 has an axial bore 54 therethrough arranged to receive a drive shaft 56. The drive shaft 56 is keyed to the arbor 44 by a key 58 positioned in mating keyways in the shaft 56 and the arbor 44. A screw 60 fastens the key 58 to the arbor 44 so that the arbor 44 rotates with the shaft 56. The shaft 56 has a longitudinal threaded bore 62 extending through the end portion 64. A bolt 66 and washer 68 secure the arbor 44 to the drive shaft 56. The arbor 44 has an enlarged bore 70 coaxial with the bore 54 that forms a shoulder 72 therebetween. A tubular member 74 having an end portion 76 with a central aperture 78 therethrough is positioned within the bore 70 with the shaft 56 extending through the central aperture 78. The external surface of the tubular member 74 is so dimensioned that it is movable axially within the bore 70, and the aperture 78 in the end portion 76 is so dimensioned that the drive shaft 56 is freely movable therethrough. A coil spring 80 is positioned around the shaft 56 within the tubular member 74 and abuts the end portion 76 and the shoulder portion 72 formed within the bore 70 in arbor 44. An adjusting nut 82 is threadedly secured to the shaft 56 and abuts the tubular member end portion 75 to provide a stop means for the tubular member 74. A cap screw 84 is provided to secure the adjusting nut 82 to the shaft 56.With this arrangement the arbor 44 and shaft 56 are movable axially relative to the tubular member 74 to compress the spring 80. The spring 80 urges the arbor 44 to the position illustrated in FIGURE 3. An air motor 42 or equivalent device for imparting rotary motion is connected to the shaft 56 to rotate the shaft 56 of cleaning tool 38 to thereby rotate the arbor 44 with the radially extending arms 46, 48, 50 and 52. The air motor diagrammatically illustrated in FIGURE 2 provides rotation to shaft 56 by supplying air under pressure to the air motor 42 to rotate the shaft of the air motor 42 (not shown) and the shaft 56 of the cleaning tool 38 connected thereto.

The opposed radial arms 46 and 50 are similar in construction and are arranged to carry cutter elements 86 and 88 that travel in a circumferential cleaning path. The arms 48 and 52 are also similar in construction and are arranged to carry cutter elements 90 and 92 that have their cutting or cleaning surfaces arranged to travel in an annular cleaning path, and extend forwardly of the rotary cutting tool 38. The cutter elements 86, 88, 90 and 92 are identical in construction so that the same cutter element may be utilized as a circumferential cutting element or as an annular forwardly extending cutting element.

Since the cutting elements 86, 88, 90 and 92 are similar in construction, similar numerals will indicate similar parts of the cutter element. The cutter elements, for example, element 86, are formed from rectangular tubing that has a bottom wall 94, end walls 96 and 98, and a top wall 100. The cutting element is shaped so that the end walls 96 and 98 have inclined edge portions 102 and 104 that converge toward each other, as is illustrated in FIG: URES 4 and 5. The top wall 100 has parallel edge por.- tions 106 and 108 extending longitudinally between the respective side wall edge portions 102 and 104. The top Wall edge portions 106 and 108 are ground at an angle, as illustrated in FIGURE 4, to form a pair of longitudinal cutting edges for the respective cutter element. The side walls 96 and 98 have their edge portions 102 and 104 ground at substantially the same angle as the top wall edge portions 106 and 108 to form cutting edges for both of the side walls 96 and 98. With this arrangement there is provided a reversible cutter element that has sharpened or ground edges on opposite sides thereof so that both sides of the cutter element may be utilized in the cleaning operation. For example, when the arbor 44 is rotating in the direction of the arrow indicated in FIGURE 4, the side wall edges 104 and the top wall edge 106 serve as the active cutting edges for the cutter element86. Upon reversal of the arbor 44 so that the direction of rotation is opposite to the arrow illustrated in FIGURE 4,'the side wall edges 102 and the top wall edge 106 would serve as the active cutting edges. When it is desired to rotate the arbor 44 in a preselected direction such as the direction indicated in FIGURE 4, the cutter elements can be rotated axially, as later described, to reverse the relative position of the cutting edges so that all cutting edges can be utilized before the cutter element is removed for sharpening. The cutter element bottom wall 94 has an elongated slotted portion 110 and a pair of pin apertures 112 and 114 extending therethrough.

Securing keys 116 are arranged to secure the cutter elements to the arbor arms 46, 48, 50 and 52. The securing key 116 is clearly illustrated in FIGURE 6 and includes a body portion 118 with a transverse pin receiving aperture 120 therein. Thebody portion has a pair of opposed inwardly extending cutaway portions 122 and 124 which form a central portion of reduced width 126 that connects the body portion 118 with a key portion 128'. The key portion 128 is so dimensioned that it freely passes upwardly through the elongated slot in the cutter element bottom wall 92 and when rotated 90, as illustrated in FIGURES 4 and 6 has end portions 132 that abut the upper surface of the bottom wall 94.

The radially extending arms 46 and 50 are similar in construction and the manner in which the cutter elements 86 and 88 are secured thereto is illustrated in FIGURES 3 and 4. Since the arms 46 and 50 are similar in construction, similar numerals will be given to similar elements. The arms 46 and 50 have a radially inwardly extending slotted portion 134 in which the securing key 116 is positioned. The arms have a longitudinal pin receiving bore 136 with an enlarged threaded portion 138 opening into the rear surface 140 of the arm 46. A radial pin receiving bore 142 extends radially from the threaded portion 138 and opens into the radial end portion 144 of arm 46. The radial end portion 144 has a longitudinal slotted port-ion 146 arranged to receive the cutter element 86.

The cutter element 86 is secured to the radial arm 46 by inserting the securing key 116 through the slot 110 and rotating the securing key 116 90 so that the end portions 130 and 132 abut the upper surface of the cutter element bottom wall 94. The securing key 116 is inserted in the radial slot 134 until the aperture 120 is aligned with the bore 136 (FIGURE 3). A tapered pin 147 is inserted through the bore enlarged portion 138 into bore 136 and is so dimensioned that an end portion 148 extends beyond the arbor front wall 150. A locating pin 152 is inserted through enlarged bore 138 into the radial bore 142 and extends upwardly therethrough and through an aperture 112 in the cutter element bottom wall 94. A portion of the pin 152 extends beyond the upper surface of the cutter element bottom wall 94. A set screw 154 is inserted in the enlarged bore 138 and maintains the pins 147 and 152 in operative position to maintain the cutter element 86 in operative position on the radial arm 46. To remove and reverse the cutter element 86, the set screw 154 is removed and the pin 147 is removed from the bore 136 'by tapping the pin end portion 148; The cutter element 86 and the securing key 116 are removed from the respective longitudinal slot 146 and radial slot 144. The cutter element is rotated 180 and the securing key 116 is reinserted in the slot 134 with the pin 152 extending through the aperture 114. The pin 147 is then reinserted in bore 136 and the set screw 154 replaced. With this arrangement, cuter elements 86 and 88 are fixedly secured to the arbor radial arms 46 and 50 and upon rotation of the arbor in the direction illustrated in FIGURE 4, provides cleaning surfaces that follow a circumferential path and remove tarry substances on the surfaces 36 and 32 of the metal seal ring 26 (FIGURE 1). It should be noted that the cutter elements are so dimensioned that they conveniently fit between the metal seal ring flange 34 and the refractory retainer flanges 18 or 20 and effectively re move the tarry deposits on the surfaces 32 and 36-.

The radial arms 48 and 52 are also similar in construction and similar numerals will designate similar parts. The arm 52 has a slotted portion 156 and a tapered radial bore 158 (FIGURE 5) with an enlarged threaded portion 160 that extends through the arm radial end portion 162. A longitudinal bore 164 extends from the enlarged bore 160 through the arm 52 and opens into the arm front surface 166. A longitudinal passageway 168 extends through the arm 52 adjacent to the longitudinal slot 156. The arm upper surface 166 has radial slot 170 so dimensioned to receive the cutter element 92 therein. To secure the cutter element 92 to the arm 52 the securing key 116 is inserted in cutter element bottom wall slot and rotated 90 to the position illustrated in FIG- URE 6. The locater pin 172 is positoined in the bore 164. The securing key body portion 118 is inserted in the longitudinal slot 156 with the securing key aperture aligned with the bore 158 and the pin 172 extending through the aperture 112 in the cutter element 92. A tapered pin 174 is inserted in the bore 158 through the aperture 120 in securing key 116, and the set screw 176 is threadedly secured in the bore enlarged portion to secure the pins 172 and 174 in the respective bores and thereby lock the cutter element 92 within the arm slotted portion 168. To remove and reverse the cutter element 92 the set screw 176 is removed and a tool is inserted in the passageway 168 to urge the pin 174 radially outwardly in bore 158 until the securing key 116 may be removed from slot 156. The cutter element 92 is then rotated and the securing key 116 is repositioned in slot 156 with the pin 172 in cutter element bottom wall aperture 114. The pin 174 and set screw 176 are replaced to again fixedly secure the cutter element 92 to the arm 52. With this ararngement, cutter elements 90 and 92 are secured to the arms 48 and 52 so that upon rotation in a direction indicated in FIGURE 4 the cutter elements 90 and 92 circumscribe an annular path and are operable to remove tarry deposits locatedon a surface substantially parallel to the front surface of the arbor 44. The cutter elements 90 and 92 extend forwardly from the arbor 44 a greater distance than the side walls 96 of cutter elements 86 and 88 so that the radial cutter elements 86 and 88 do not interfere wtih the forwardly extending cutter elements 90 and 92. The cutter elements 90 and 92 are arranged to remove the deposits from the refractory retainer surfaces 24. Thus, upon movement of the cutter elements 38 in the directions indicated in FIG- URE 2 the annular paths circumscribed by the cutter elements 90 and 92 overlap to remove all of the tarry deposits on the surfaces 24 of the metallic refractory retainer flange 18.

Referring to FIGURES 7 and 8 there is illustrated another embodiment of this invention that includes a pair of tandem cutter elements secured to the arbor. The cleaning tool generally designated by the numeral 178 has an arbor 180 with a front planar surface 182. A transverse radial recess 184 extends diametrically across the front face of the arbor 180 and is arranged to receive a pair of cutting elements generally designated by the numerals 186 and 188. The arbor 180 has an axial threaded bore 190 therethrough with an enlarged portion 192 opening into the rear face. The arbor has other threaded bores 194 and 196 extending longitudinally theret-hrough on opposite sides of the axial bore 190. A drive shaft 198 having a front threaded portion 200 and a shoulder 202 is positioned in the axial bore 190 with the shoulder 202 abutting the front edge of the bore enlarged portion 192. The arbor has a radial bore 204 that opens into the axial bore 190. A pin 206 is positioned in bore 204 and is urged forwardly against the shaft threaded end portion 200 by means of a set screw 208. The drive shaft 198 is thus retained within the bores 190 and 192 by means of the radially extending pin 206. The drive shaft end portion front threaded portion terminates in a front end portion 210 that is positioned slightly below the surface of the recessed portion 184 in the arbor front face 182.

The cutting element 186 and 188 are substantially the same as the cutting elements described in conjunction with the embodiment illustrated in FIGURES 3, 4, 5 and 6, and similar portions of the cutter elements will wardly beyond the arbor front face 182. The threaded shaft 214 extends through the aperture 212 in the respective cutter element bottom wall and a nut 220 secures the cutter element to the arbor 180 with the bottom wall 194 seated in the arbor front wall recessed portion 184. With this arrangement there is provided a cleaning tool that has a pair of self-cleaning cutter elements 186 and 188 aligned in tandem across the front face of the rotatable arbor 180. Thus when the shaft 198 is rotated by a suitable drive means the arbor 180 rotates and the cutter elements 186 and 188 are operable to remove tarry material from surfaces of the coke oven door, A tubular member 222 is secured to the rear face of the arbor 1'80 and a coil spring 224 is positioned around the drive shaft enlarged portion 198 within the tubular member 222. The coil spring 224 is, arranged to provide a cushioning means for the arbor 180 in a manner similar to the coil spring 80 in the embodiment illustrated in FIGURES 3, 4, 5 and 6.

With the above described tool it is now possible in one operation to clean a plurality of surfaces of a coke oven door in a single operation. The cutting elements 90 and 92 are operable upon rotation to remove the t-arry substances from the surface 24 while the cutter elements 86 and 88 are operable to remove the tarry substances from the surfaces 32 and 36 on the seal ring 26. The cutter elements employed with the tool 38 have a plurality of sharpened cutting surfaces and are reversible so that the tool can be used for a longer period without resharpening the cutter elements. The cutter elements, because of their tubular construction, are self-cleaning and thereby eliminate the accumulation of tarry material thereon. The cutting elements are all ofthe same construction and are interchangeable so that the inventory of cutting elements may be maintained at a minimum.

Although the cleaning tool 38 has been described as useful in the cleaning of coke oven doors, it should be understood that the cleaning tool may be also employed for removing the tarry material from the coke oven door frame.

According to the provisions of the patent statutes, the principle, preferred construction, and mode of. operation of the invention have been explained and what is considered to represent its best embodiments hasbeen ilustrated. However, it should be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A tool for cleaning a coke oven door having a side wall and a seal member extending laterally therefrom comprising,

an arbor having an axialbore for receiving a drive shaft,

a drive shaft positioned in said axial bore,

means to secure said drive shaft in said axial bore for rotation of said arbor therewith,

said arbor having a front planar surface with a transverse recessed portion therein,

a tubular cutting element positioned in said transverse recessed portion and extending forwardly from said arbor,

said cutting element having a rectangular configuration with a bottom wall, a pair of side walls, and a top wall,

said top wall having a pair of parallel side edge portions tapering inwardly and forming cutting surfaces for said cutting element, and

means to secure said cutting element bottom ,wall in said arbor front planar surface transverse recessed portion,

said cutting element top wall side edge portions operable upon rotation of said drive shaft to remove the tarry material deposited on said coke oven door during the coking operation.

2. A tool for cleaning a coke oven door having a side wall and a seal member extending laterally therefrom comprising,

an arbor having an axial bore for receiving a drive shaft,

a drive shaft positioned in said axial bore,

means to secure said drive shaft in said axial bore for rotation of said arbor therewith,

said arbor having a front planar surface with a transverse recessed portion therein,

a tubular cutting element positioned in said transverse recessed portion and extending forwardly from said arbor,

said cutting element having a rectangular configuration with a bottom wall, a pair of side walls, and a top wall,

said side walls having, a trapezoidal shape with the side edges converging toward said top wall,

said top wall having a pair of parallel side edge'portions tapering inwardly and forming cutting surfaces for said cutting element,

said side wall side edges tapering inwardly and forming cutting surfaces, and

means to secure said cutting element bottom wall in said arbor front planar surface transverse slot,

said cutting element top wall side edge portions operable upon rotation of said drive shaft to. remove the tarry material deposited on a surface of said coke oven door during the coking operation and said cutting element side edge portions arranged to remove the tarry material deposited on a surface of said coke oven door that is substantially perpendicular to the surface cleaned by said cutting element top wall side edge portions.

3. A tool for cleaning a coke oven door having a side wall and a seal member extending laterally therefrom comprising,

an arbor having an axial, bore for receiving a drive shaft,

a drive shaft positioned in said axial bore,

means to secure said drive shaft in said axial bore for rotation of said arbor therewith,

said arbor having a front planar surface with a transverse recessed portion therein,

tubular means positioned coaxially on said drive shaft,

resilient means positioned within said tubular member and abutting the rear surface of said arbor,

said resilient means urging said arbor forwardly,

said resilient means forming means to permit said cutting element to maintain a preselected force on said coke oven door,

a tubular cutting element positioned in said transverse recessed portion and extending forwardly from said arbor,

said cutting element having a rectangular configuration with a bottom Wall, a pair of side walls, and a top wall,

said side walls having a trapezoidal shape with the side edges converging toward said top Wall,

said top wall having a pair of parallel side edge portions tapering inwardly and forming cutting surfaces for said cutting element,

said side wall side edges tapering inwardly and forming cutting surfaces, and

means to secure said cutting element bottom Wall in said arbor front planar surface transverse slot,

said cutting element top wall side edge portions operable upon rotation of said drive shaft to remove the tarry material deposited on a surface of said coke oven door during the coking operation and said a key member having a head portion extending through said elongated slot in said cutting element bottom wall and abutting top surfaces of said bottom wall,

said key member having a body portion positioned in cutting element side edge portions arranged to resaid tangential slot, and

move the tarry material deposited on a surface of means to secure said key member body portion in said said coke oven door that is substantially perpendictangential slot and thereby secure said cutting eleular to the surface cleaned by said cutting element ments in said radial arm recessed portion,

top wall side edge portions. said cutting elements arranged upon rotation of said 4. A tool for cleaning a coke oven door having a side drive shaft to remove the tarry material deposited on wall and a seal member extending laterally therefrom comprising,

an arbor having a radial arm portion extending laterally therefrom, a front surface and a rear surface,

a drive shaft secured to said arbor and extending rearwardly therefrom,

said arbor having a front planar surface with a radially extending recessed portion in said front planar surface of said radial arm portion,

surfaces of said coke oven door during the coking operation. 6. A tool for cleaning a coke oven door having a side wall and a seal member extending laterally therefrom comprising,

an arbor having a radial arm portion extending laterally therefrom, a front surface and a rear surface,

a drive shaft secured to said arbor and extending rearwardly therefrom for rotation of said arbor therewith,

a tubular Cutting element Positioned in S radially said radial arm having an end portion with a longituextending recessed portion and extending forwardly di l r ed portion therein, from said arbor front planar urfa a tubular cutting element positioned in said longitu- Said Cutting elements each having a rectangular C011- dinal recessed portion and extending radially therefiguration with a bottom wall, a pair of side walls, f and atop wall, said cutting element having a rectangular configurasaid op W l having a P Of Parallel Side edge P tion with a bottom wall, a pair of side walls and a tions tapering inwardly and forming cutting surfaces top ll, for said cutting element, said top wall having a pair of parallel side edge por- Said cutting element Positioned in Said radially tions tapering inwardly and forming cutting surfaces tending recessed portion with said cutting surface f r id cutting elemgnt eXteIlding forwardly from Said arbor front Planar said cutting element positioned in said radial arm surface, and longitudinal recessed portion with said cutting surmeans to secure said cutting element to sa1d arbor f e extending di 11 th fr ,-a d

radial arm PorfioI1 in Said radially extending recessed means to secure said cutting element to said radial arm portion, end portion,

ai Cutting element arranged upon rotation of sa1d said cutting element arranged upon rotation of said drive ha t t remove i111e tarry material deposited drive shaft to remove the tarry material from a suron surfaces of d Coke Oven (100T during the face of a coke oven door that is substantially perpening operatlou. dicular to said arbor front face.

5. A tool clawing a Coke Oven door having a side 7. A tool for claning a coke oven door having a side wall and a seal member extending laterally therefrom wall and a seal member extending laterally therefrom comprising,

comprising,

an arbor having a pair of radial arm portions and an axial bore, I

an arbor having a pair of radial arms extending laterally therefrom, a front surface and a rear surface,

a drive Shaft Positioned in Said aXial bore: a drive shaft secured to said arbor and extending rearmeans to secure said drive shaft in said axial bore for Wardly th r f rotation of said arbor therewith, one of said arms having a radially extending recessed said arbor having a front planar surface with radially Portion in Said f t surface extending recessed Portions in Said from P1211151r the other of said arms having an end portion with a face of said radial arm portions, longitudinal recessed portion,

each of Said radial arm Portions having a tangential a pair of tubular cutting elements having a rectangular slot therein substantially perpendicular to the axis of fi ti with a bottom wall, a Pair f Side walls, said arm members, and a top wall,

a pair of tubular cutting elements positioned in said said top wall having a i of ,11 1 id d radially extending recessed Portions in Spaced Tela' tions tapering inwardly and forming cutting surfaces tion to each other nad extending forwardly from fo id cutting l 1 said arbor front planar surface, one of said cutting elements secured in said radial resaid cutting elements each having a rectangular concessed portion with said cutting surfaces extending figuration with a bottom wall, a pair of side walls, forwardly therefrom, and and a top wall, the other of said cutting elements secured in said longisaid bottom wall having an elongated longitudinal slot tudinal recessed portion with said cutting surfaces therein, extending radially therefrom,

said side walls having a trapezoidal shape with the side said tool arranged upon rotation of said drive shaft edges converging toward said top wall, to remove the tarry material from a side wall surface said top wall having a pair of parallel side edge portions tapering inwardly and forming cutting surfaces for said cutting element,

said sidewall side edge portions tapering inwardly and forming other cutting surfaces for said cutting element,

said cutting elements positioned in said radially extending recessed portions with said cutting surfaces extending forwardly from said arbor front planar surface,

of a coke oven door and a surface of said seal member extending laterally from said door. 8. A tool for cleaning a coke oven door having a side wall and a seal member extending laterally therefrom comprising,

a pair of tubular cutting elements having a rectangular configuration with a bottom wall, a pair of side Walls, and a top wall,

said top wall having a pair of parallel side edge portions tapering inwardly and forming cutting surfaces for said cutting element,

said cutting elements secured in said recessed portion in tandem relation and having said cutting surfaces extending forwardly therefrom, and

said cutting elements operable upon rotation of said drive shaft to remove the tarry material deposited on said coke oven door during the coking operation.

9. A tool for cleaning a coke oven door as set forth in claim 8 in which said arbor front face recessed portion has a pair of spaced shafts extending forwardly therefrom,

said cutting element bottom walls each having an aperture therethrough,

said spaced shafts extending in a one to one relation through said cutting element apertures, respectively and fastening means on said shafts securing said cutting elements to said arbor in said recessed portion.

10. A tool for cleaning a coke oven door as set forth in claim 8 in which said arbor includes a plurality of longi- 12 tudinal bores opening into said recessed portion,

said cutting element bottom wall having an aperture therethrough,

said drive shaft extending through one of said bores and secured therein,

threaded bolt members positioned in a pair of said other bores and eachrhaving a portion extend forwardly from said arbor front face,

said cutting elements positioned in said recessed portion with said bolt member portions extending respectively through said apertures, and

nuts threadedly secured to said bolt member portions and securing said cutting elements in said recessed portion.

References Cited UNITED STATES PATENTS 841,332 l/l907 Lehnert .15-236 CHARLES A. WILMUTH, Primlary Examiner.

L. G. MACHLIN, Assistant Examiner. 

1. A TOOL FOR CLEANING A COKE OVEN DOOR HAVING A SIDE WALL AND A SEAL MEMBER EXTENDING LATERALLY THEREFROM COMPRISING, AN ARBOR HAVING AN AXIAL BORE FOR RECEIVING A DRIVE SHAFT, A DRIVE SHAFT POSITIONED IN SAID AXIAL BORE, MEANS TO SECURE SAID DRIVE SHAFT IN SAID AXIAL BORE FOR ROTATION OF SAID ARBOR THEREWITH, SAID ARBOR HAVING A FRONT PLANAR SURFACE WITH A TRANSVERSE RECESSED PORTION THEREIN, A TUBULAR CUTTING ELEMENT POSITIONED IN SAID TRANSVERSE RECESSED PORTION AND EXTENDING FORWARDLY FROM AID ARBOR, SAID CUTTING ELEMENT HAVING A RECTANGULAR CONFIGURATION WITH A BOTTOM WALL, A PAIR OF SIDE WALLS, AND A TOP WALL, SAID TOP WALL HAVING A PAIR OF PARALLEL SIDE EDGE PORTIONS TAPERING INWARDLY AND FORMING CUTTING SURFACES FOR SAID CUTTING ELEMENT, AND 